title: Ultrasound-assisted extraction of total phenolic compounds from Inula helenium.
abstract: Ultrasound-assisted extraction (UAE) of phenolic compounds from Inula helenium was studied. Effects of ethanol concentration, ultrasonic time, solid-liquid ratio, and number of extractions were investigated. An orthogonal array was constructed to optimize UAE process. The optimized extraction conditions were as follows: ethanol concentration, 30%; solid-liquid ratio, 1 : 20; number of extractions, 2 times; extraction time, 30 min. Under the optimal conditions, the yield of total phenolic compounds and chlorogenic acid was 6.13 ± 0.58 and 1.32 ± 0.17 mg/g, respectively. The results showed that high amounts of phenolic compounds can be extracted from I. helenium by ultrasound-assisted extraction technology.
authors.affiliation: Department of Pharmacy, Hebei North University, Zhangjiakou, Hebei 075000, China.
authors.forename: Jin
authors.initials: J
authors.lastname: Wang
authors.forename: Yong-Ming
authors.initials: YM
authors.lastname: Zhao
authors.forename: Ya-Ting
authors.initials: YT
authors.lastname: Tian
authors.forename: Chun-Lin
authors.initials: CL
authors.lastname: Yan
authors.forename: Chun-Yan
authors.initials: CY
authors.lastname: Guo
mesh_terms: D038143:Inula / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry* / Q000302:isolation & purification; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D014465:Ultrasonics
chemical_list: D010636:Phenols; D010936:Plant Extracts